Prime Minister Is Under Pressure as Demonstrators Plan Fresh Rallies

BANGKOK—Yingluck Shinawatra still looks the part of Thailand's prime minister. Perched on a chair at the Venetian-Gothic government headquarters in Bangkok, she counts off her successes since thousands of opposition protesters last month launched a campaign to unseat her—chief of which is that she is still prime minister.

But in an interview with a group of visiting reporters Saturday, she conceded that Thailand's sometimes-violent...